Engine mount and method of manufacturing the same

ABSTRACT

An engine mount may include: a support device; a bracket device; and a vibration proof device which connects the support device and the bracket device, and, in which the vibration proof device may include a nozzle device fastened to the support device, and has a nozzle plate dividing an internal space of the vibration proof device into a first liquid chamber and a second liquid chamber, and a flow path penetrating the nozzle plate; a first insulator defining the first liquid chamber together with the nozzle plate; a first core protruding from the first insulator toward one side, and fastened to the bracket device; a second insulator defining the second liquid chamber together with the nozzle plate; and a second core protruding from the second insulator and fastened to the bracket device.

CROSS-REFERENCE(S) TO RELATED APPLICATIONS

The present application claims priority to Korean Patent Application No.10-2016-0168327, filed on Dec. 12, 2016, the entire contents of which isincorporated herein for all purposes by this reference.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to an engine mount which is mounted on avehicle body to support an engine, and may change the dampingcharacteristics in accordance with characteristics of vibrationtransmitted from the engine.

Description of Related Art

An engine of a vehicle is disposed in an engine compartment of a vehiclebody by an engine mount to attenuate vibrations in the engine. Based onthe internal configuration of the engine mount applied to the vehicle,the engine mount may be classified into a rubber mount which insulatesvibration by use of the elastic force of rubber, and a fluid-filledmount (hydraulic mount) which insulates vibrations by use of anencapsulated hydraulic liquid, and based on the shape of thefluid-filled mount the fluid-filled mount may be broadly classified intoa conical fluid mount and a box-like fluid mount.

FIG. 1A and FIG. 1B are views illustrating a conical fluid mount in therelated art, and FIG. 2A and FIG. 2B are views illustrating a box-likefluid mount in the related art.

Referring to FIG. 1A and FIG. 1B, a conical fluid mount 1 in the relatedart is formed in an approximately cylindrical shape, and has therein aconical insulator and a circular flow path (orifice), easily adjustingthe flow of a fluid within the mount. The advantage of the conical fluidmount 1 is that it is possible to appropriately design a loss factor byapplying the circular flow path, and the conical fluid mount 1 isadvantageous in terms of durability because the thickness of theinsulator is changed less. However, there are problems in that a leveldifference from an engine support is increased because a core needs tobe mounted at an upper side of the conical insulator, and the dynamicstiffness of the support deteriorates.

Meanwhile, referring to FIG. 2A and FIG. 2B, a box-like fluid mount 2 inthe related art has an advantageous structure in terms of costs, weight,and dynamic stiffness because it is possible to reduce the leveldifference from the engine support in comparison with the conical fluidmount 1. However, there are problems in that the pumping region may beinsufficient because a quadrangular insulator is disposed in thebox-like fluid mount 2, and the box-like fluid mount 2 isdisadvantageous in terms of fluid characteristics as the flow path isformed in a quadrangular shape, and a portion of the insulator where thethickness is small is damaged.

Since the two types of mounts have clearly different advantages anddisadvantages, there is a problem in that it is difficult to apply anoptimized shape to the vehicle.

The information disclosed in this Background of the Invention section isonly for enhancement or understanding of the general background of theinvention and should not be taken as an acknowledgement of any form ofsuggestion that this information forms the prior art already known to aperson skilled in the art.

BRIEF SUMMARY

Various aspects of the present invention are directed to providing astructure of a fluid mount configured for reducing a level differencefrom an engine support even while adopting a conical insulator.

The present invention has also been made in an effort to provide animproved structure of a fluid mount configured for improving thedurability and a damping ratio of an insulator.

The present invention has also been made in an effort to provide a fluidmount configured for inhibiting transmission of abnormal noise occurringin a flow path by improving insulation characteristics.

An exemplary embodiment of the present invention are directed toproviding an engine mount including a support device which is fastenedto an engine; a bracket device which is fastened to a vehicle body; anda vibration proof device which connects the support device and thebracket device, and attenuates vibration transmitted from the engine tothe vehicle body, in which the vibration proof device includes a nozzledevice which is fastened to the support device, and has a nozzle platewhich divides an internal compartment of the vibration proof device intoa first liquid chamber and a second liquid chamber, and a flow pathwhich penetrates the nozzle plate; a first insulator which is disposedat one side of the nozzle device, and defines the first liquid chambertogether with the nozzle plate; a first core which protrudes from thefirst insulator toward one side, and is fastened to the bracket device;a second insulator which is disposed at the other side of the nozzledevice, and defines the second liquid chamber together with the nozzleplate; and a second core which protrudes from the second insulatortoward the other side, and is fastened to the bracket device, and thefirst insulator and the second insulator are disposed to face each otherat both sides of the nozzle device.

The first insulator may be disposed at an upper side of the nozzledevice, the first core may protrude upward from the first insulator andmay be fastened to an upper portion of the bracket device, the secondinsulator may be disposed at a lower side of the nozzle device, and thesecond core may protrude downward from the second insulator and may befastened to a lower portion of the bracket device.

When the nozzle device is moved upward by the movement of the device,the first insulator may be compressed, and the second insulator may beextended, and when the nozzle device is moved downward by the movementof the support device, the first insulator may be extended, and thesecond insulator may be compressed.

When the nozzle device is moved upward by the movement of the supportdevice, the fluid in the first liquid chamber may flow to the secondliquid chamber via the flow path, and when the nozzle device is moveddownward by the movement of the support device, the fluid in the secondliquid chamber may flow to the first liquid chamber via the flow path.

The nozzle device may be formed in a cylindrical shape, the flow pathmay be formed in an annular shape, and the support device may include avibration proof device fastening portion coupled to an externalcircumference of the nozzle device.

Each of the first insulator and the second insulator may be formed in aconical shape having an opening at a bottom side thereof, and theopenings of the first and second insulators may be disposed to bedirected toward the nozzle device, an apex portion of the firstinsulator may be disposed to be directed toward one side, and an apexportion of the second insulator may be disposed to be directed towardthe other side.

The bracket device may include: an upper bracket to which the first coreis fastened; a lower bracket which is disposed to face the upper bracketand to which the second core is fastened; a first side bracket whichextends from one end portion of the upper bracket to one end portion ofthe lower bracket; and a second side bracket which is disposed to facethe first side bracket, and extends from the other end portion of theupper bracket to the other end portion of the lower bracket, and thevibration proof device may be disposed in a compartment defined by theupper bracket, the lower bracket, the first side bracket, and the secondside bracket.

The support device may include a vibration proof device fasteningportion which is fastened to an external circumference of the nozzledevice, and a first stopper which protrudes from an externalcircumferential surface of the vibration proof device fastening portionin a radial direction thereof, and a first stopper catching portion,which restricts upward and downward movements of the first stopper, maybe provided on the first side bracket.

The first stopper catching portion may include: an upward catchingportion which is formed as the first side bracket, which extendsdownward from one end portion of the upper bracket, is bent toward oneside; and a downward catching portion which is formed as the first sidebracket, which extends upward from one end portion of the lower bracket,is bent toward one side.

The support device may include a vibration proof device fasteningportion which is fastened to an external circumference of the nozzledevice, a plurality of protruding portions which protrudes from anexternal circumferential surface of the vibration proof device fasteningportion in a radial direction thereof, and a second stopper which isdisposed between the protruding portions, and a second stopper catchingportion, which restricts forward and rearward movements of the secondstopper, may be disposed on the second side bracket.

The second stopper catching portion may include: a forward catchingportion which is disposed at a front side of the second side bracket,and restricts the forward movement of the second stopper; and a rearwardcatching portion which is disposed at a rear side of the second sidebracket, and restricts the rearward movement of the second stopper.

The support device and the bracket device may be manufactured by analuminum extrusion process.

Another exemplary embodiment of the present invention is directed toproviding a method of manufacturing an engine mount, which includes asupport device that is fastened to an engine, a bracket device that isfastened to a vehicle body, and a vibration proof device that connectsthe support device and the bracket device, the method including:manufacturing the support device or the bracket device by an extrusionprocess; forming a stopper on an external circumference of the supportdevice by a curing process; inserting a vibration proof device into aninternal circumference of the support device; and fastening thevibration proof device, which is inserted into the support device, tothe bracket device.

The manufacturing of the support device and the bracket device by theextrusion process may manufacture each of the support device and thebracket device by an aluminum extrusion method.

The support device may include a vibration proof device fasteningportion on which the vibration proof device is disposed, the forming ofthe stopper on the external circumference of the support device by thecuring process may include attaching the stopper to an externalcircumferential surface of the vibration proof device fastening portionby the curing process, and the inserting of the vibration proof deviceinto the internal circumference of the support device may includeinserting the vibration proof device into an internal circumferentialsurface of a vibration proof device fastening portion.

The present invention, which is configured as described above, mayreduce a level difference even while adopting a circular insulator and acircular flow path, and as a result, it is possible to ensure fluidperformance and durability, and to improve the dynamic stiffness of asupport.

According to the engine mount of the present invention, the insulatorsare disposed in series, and as a result, it is possible to improvedurability and a damping ratio.

Abnormal noise occurring in the flow path is not transmitted directly tothe vehicle body, and may be attenuated by the insulator.

The methods and apparatuses of the present invention have other featuresand advantages which will be apparent from or are set forth in moredetail in the accompanying drawings, which are incorporated herein, andthe following Detailed Description, which together serve to explaincertain principles of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A and FIG. 1B are views illustrating a conical fluid mount in therelated art.

FIG. 2A and FIG. 2B are views illustrating a box-like fluid mount in therelated art.

FIG. 3 is a perspective view of an engine mount according to anexemplary embodiment of the present invention.

FIG. 4 is an exploded perspective view of the engine mount according toan exemplary embodiment of the present invention.

FIG. 5 is a perspective view of a vibration proof device according to anexemplary embodiment of the present invention.

FIG. 6 is a cross-sectional view of the vibration proof device accordingto an exemplary embodiment of the present invention.

FIG. 7 is a perspective view of a support device according to anexemplary embodiment of the present invention.

FIG. 8 is a perspective view of a bracket device according to anexemplary embodiment of the present invention.

FIG. 9 is a front view of the engine mount according to an exemplaryembodiment of the present invention.

FIG. 10 is a top plan view of the engine mount according to an exemplaryembodiment of the present invention.

FIG. 11 is a view diagrammatically illustrating a method ofmanufacturing the engine mount according to an exemplary embodiment ofthe present invention.

FIG. 12 and FIG. 13 are views illustrating a structure of the enginemount when the bracket device according to an exemplary embodiment ofthe present invention moves in an up and down direction thereof.

It should be understood that the appended drawings are not necessarilyto scale, presenting a somewhat simplified representation of variousfeatures illustrative of the basic principles of the invention. Thespecific design features of the present invention as disclosed herein,including, for example, specific dimensions, orientations, locations,and shapes will be determined in part by the particular intendedapplication and use environment.

In the figures, reference numbers refer to the same or equivalent partsof the present invention throughout the several figures of the drawing.

DETAILED DESCRIPTION

Reference will now be made in detail to various embodiments of thepresent invention(s), examples of which are illustrated in theaccompanying drawings and described below. While the invention(s) willbe described in conjunction with exemplary embodiments, it will beunderstood that the present description is not intended to limit theinvention(s) to those exemplary embodiments. On the contrary, theinvention(s) is intended to cover not only the exemplary embodiments,but also various alternatives, modifications, equivalents and otherembodiments, which may be included within the spirit and scope of theinvention as defined by the appended claims.

FIG. 3 is a perspective view of an engine mount according to anexemplary embodiment of the present invention, and FIG. 4 is an explodedperspective view of the engine mount according to an exemplaryembodiment of the present invention.

Referring to FIG. 3 and FIG. 4, an engine mount 10 according to anexemplary embodiment of the present invention includes a support device200 which is connected to an engine of a moving means, a bracket device300 which is connected to a vehicle body of the moving means, and avibration proof device 100 which connects the support device 200 and thebracket device 300 and prevents vibration of the engine from beingtransmitted to the vehicle body. Respective constituent elements of theengine mount 10 and fastening structures between the constituentelements will be described in detail below.

FIG. 5 is a perspective view of the vibration proof device according toan exemplary embodiment of the present invention, and FIG. 6 is across-sectional view of the vibration proof device according to anexemplary embodiment of the present invention.

Referring to FIG. 5 and FIG. 6, the vibration proof device 100 includesa nozzle device 110 which is disposed at a central portion of thevibration proof device 100, insulators 131 and 133 which are coupled toboth sides of the nozzle device 110, and cores 151 and 153 which fastenthe insulators 131 and 133 to the bracket device 300.

The nozzle device 110 may include a nozzle plate 111 which divides aninternal compartment of the vibration proof device 100 into a firstliquid chamber 141 and a second liquid chamber 142, and flow paths 112and 113 which are formed to penetrate the nozzle plate 111.

The nozzle plate 111 may be formed in a circular plate shape, an openingmay be formed in a central portion of the nozzle plate 111, and amembrane may be disposed in the opening.

Meanwhile, the flow paths 112 and 113 may include a first flow path 112which is disposed between the central portion of the nozzle plate 111and the membrane, and a second flow path 113 which is disposed at therim portion of the nozzle plate 111 and defines an annular flow path.Since the second flow path 113 is formed in an annular shape, fluidperformance of the engine mount is superior than that of the box-likefluid mount 2 in the related art.

The first flow path 112 and the second flow path 113 may allow the firstliquid chamber 141 and the second liquid chamber 142 to communicate witheach other, and a fluid in the first liquid chamber 141 and the secondliquid chamber 142 may flow to the first flow path 112 or the secondflow path 113 due to a pressure difference between the first liquidchamber 141 and the second liquid chamber 142. As an example, in a casein which a pressure difference between the first liquid chamber 141 andthe second liquid chamber 142 is equal to or lower than a referencepressure, the fluid may flow through the first flow path 112, and in acase in which the pressure difference exceeds the reference pressure,the fluid may flow through the second flow path 113.

The insulators 131 and 133 may include a first insulator 131 which isdisposed at an upper side of the nozzle device 110, and a secondinsulator 133 which is disposed at a lower side of the nozzle device110.

The first insulator 131 and the second insulator 133 may be formed in aconical shape which is opened at a bottom side thereof. In addition, thefirst insulator 131 may be disposed wherein an opened bottom sidethereof is directed toward the nozzle device 110 and the apex portion131 a thereof is directed upward, and the second insulator 133 may bedisposed wherein an opened bottom side thereof is directed toward thenozzle device 110 and the apex portion 133 a thereof is directeddownward.

The apex portions 131 a and 133 a may refer to portions that defineapices of the conical insulators. However, the present invention is notlimited thereto, and as illustrated in FIG. 6, the apex portion mayrefer to a separate constituent element which is coupled to theinsulator by being in contact with the insulator.

An opening of the first insulator 131 abuts an upper surface of thenozzle plate 111, and an internal circumferential surface of the firstinsulator 131 and the upper surface of the nozzle plate 111 define thefirst liquid chamber 141. Meanwhile, an opening of the second insulator133 abuts a lower surface of the nozzle plate 111, and an internalcircumferential surface of the second insulator 133 and the lowersurface of the nozzle plate 111 define the second liquid chamber 142.

The cores 151 and 153 may be disposed at end portions of the insulators131 and 133. As an example, the cores 151 and 153 may be disposed at theapex portions 131 a and 133 a of the first insulator 131 and the secondinsulator 133, respectively. In more detail, the cores 151 and 153 mayinclude a first core 151 which protrudes upward from the apex portion131 a positioned at the upper side of the first insulator 131, and asecond core 153 which protrudes downward from the apex portion 133 apositioned at the lower side of the second insulator.

The first core 151 and the second core 153 are fastened to the bracketdevice 300 to be able to fix the vibration proof device 100 and restrictthe movement of the vibration proof device 100.

Here, since the cores 151 and 153 are configured to connect theinsulators 131 and 133 with the bracket device 300, the cores 151 and153 are not limited to the term thereof, and the cores 151 and 153 maybe understood as ‘fastening devices’ or ‘connecting devices’. Inaddition, the insulators 131 and 133 are described as being formed in anopened conical shape, but the insulators 131 and 133 may be understoodas being formed in a funnel shape.

FIG. 7 is a perspective view of the support device according to theexemplary embodiment of the present invention, and FIG. 8 is aperspective view of the bracket device according to the exemplaryembodiment of the present invention.

Referring to FIG. 7 and FIG. 8, the support device 200 includes avibration proof device fastening portion 210 which fixes the nozzledevice 110, and an engine fastening portion 220 which extends from thevibration proof device fastening portion 210 and is fastened to theengine.

The vibration proof device fastening portion 210 may be fastened to anexternal circumferential surface of the nozzle device 110. In moredetail, the vibration proof device fastening portion 210 may be formedin an approximately ring shape, and an internal circumferential surfaceof the vibration proof device fastening portion 210 may be coupled tothe nozzle device to come into contact with the external circumferentialsurface of the nozzle device.

The engine fastening portion 220 is formed to extend from the vibrationproof device fastening portion 210 in one direction. As an example, theengine fastening portion 220 may be formed to extend from the vibrationproof device fastening portion 210 in a radial direction.

Meanwhile, the support device 200 may include protruding portions 240which protrude from the vibration proof device fastening portion 210 inone direction. In the present case, the protruding portions 240 mayextend toward a second side bracket 310 d to be described below. Inaddition, the number of protruding portions 240 may be more than one,and the protruding portions 240 may be disposed to be separated apartfrom each other at a predetermined distance at front and rear sides ofthe second side bracket 310 d.

The support device 200 may include stoppers 251 and 252 which are formedto protrude by a predetermined distance from an external circumferentialsurface of the vibration proof device fastening portion 210. As anexample, the stoppers 251 and 252 may include a first stopper 251 whichrestricts upward and downward movements of the support device 200, and asecond stopper 252 which restricts leftward and rightward movements ofthe support device 200.

The second stopper 252 may be formed between the plurality of protrudingportions 240. The second stopper 252 may be formed to extend from onesurface of one protruding portion 240 to one surface of the otherprotruding portion 240. In the case, the second stopper 252 may extendin a state of being in contact with the external circumferential surfaceof the vibration proof device fastening portion 210, and the secondstopper 252 may be formed in an approximately U-shape when viewed fromthe top side.

Meanwhile, since all of the engine fastening portion 220 and theprotruding portions 240 extend in the radial direction of the vibrationproof device fastening portion 210, all of the engine fastening portion220 and the protruding portions 240 may be disposed on a single planeparallel to a ground surface based on FIG. 7. The advantage of thepresent shape is that the support device 200 may be manufactured by anextrusion method.

The operations of the first stopper 251 and the second stopper 252 willbe described below together with the bracket device 300 to be describedbelow.

The bracket device 300 includes a bracket main body 310 to which thevibration proof device 100 is fastened, and vehicle body fasteningportions 320 which extend from the bracket main body 310 and arefastened to the vehicle body of the moving means.

The bracket main body 310 includes an upper bracket 310 a which definesan upper side of the bracket main body 310, a lower bracket 310 b whichfaces the upper bracket 310 a and defines a lower side of the bracketmain body 310, a first side bracket 310 c which extends from one endportion of the upper bracket 310 a to one end portion of the lowerbracket 310 b, and the second side bracket 310 d which extends from theother end portion of the upper bracket 310 a to the other end portion ofthe lower bracket 310 b.

The bracket main body 310 is opened at both sides thereof, andconfigured wherein the upper bracket 310 a, the lower bracket 310 b, thefirst side bracket 310 c, and the second side bracket 310 d define upperand lower surfaces and both lateral surfaces of the bracket main body310, respectively. In the present case, the upper bracket 310 a and thelower bracket 310 b may include surfaces facing the vehicle body, andthe first side bracket 310 c and the second side bracket 310 d mayinclude surfaces perpendicular to the surfaces facing the vehicle body.

The vehicle body fastening portion 320 may extend in a directionidentical to a direction in which the upper bracket 310 a and the lowerbracket 310 b extend, and the upper bracket 310 a, the lower bracket 310b, the first side bracket 310 c, the second side bracket 310 d, and thevehicle body fastening portions 320 may be disposed on a planeperpendicular to the ground surface based on FIG. 8. The advantage ofthe present structure is that the bracket device 300 may be manufacturedby an extrusion method.

Vibration proof device fastening holes 330, which penetrate the upperbracket 310 a and the lower bracket 310 b in an up and down directionthereof, may be disposed in the upper bracket 310 a and the lowerbracket 310 b. The first core 151 may be penetratively fixed to thevibration proof device fastening hole 330 disposed in the upper bracket310 a, and the second core 153 may be penetratively fixed to thevibration proof device fastening hole 330 disposed in the lower bracket310 b. Therefore, the upper bracket 310 a and the lower bracket 310 bfix the vibration proof device 100 to the bracket device 300.

Meanwhile, a first stopper catching portion 351 may be disposed on thefirst side bracket 310 c. The first stopper catching portion 351 may beformed in a ‘U’-shape when viewed from one side thereof, and the firststopper catching portion 351 may be formed by bending the first sidebracket 310 c.

That is, the first stopper catching portion 351 may include an upwardcatching portion 351 a which is formed as the first side bracket 310 c,which extends downward from one end portion of the upper bracket 310 a,is bent toward one side, and a downward catching portion 351 b which isformed as the first side bracket 310 b, which extends upward from oneend portion of the lower bracket 310 b, is bent toward one side.

The upward catching portion 351 a restricts an upward movement of thefirst stopper 251, and the downward catching portion 351 b restricts adownward movement of the first stopper 251, thereby restricting theupward and downward movements of the support device 200.

Meanwhile, a second stopper catching portion 352 may be disposed on thesecond side bracket 310 d. The second stopper catching portion 352 maybe understood as being two surfaces of the second side bracket 310 dwhich face each other. That is, the second stopper catching portion 352includes a forward catching portion 352 a which is disposed at a frontside of the second side bracket 310 d and restricts a rearward movementof the second stopper 252, and a rearward catching portion 352 b whichis disposed at a rear side of the second side bracket 310 d andrestricts a forward movement of the second stopper 252.

The first stopper catching portion 351 and the second stopper catchingportion 352 restrict the movements of the first stopper 251 and thesecond stopper 252, preventing the support device 200 from moving out ofa predetermined range. Meanwhile, the first stopper 251 and the secondstopper 252 may include an elastic material.

FIG. 9 is a front view of the engine mount according to an exemplaryembodiment of the present invention, and FIG. 10 is a top plan view ofthe engine mount according to an exemplary embodiment of the presentinvention.

Referring to FIG. 9 and FIG. 10, the first core 151 disposed at an upperend portion of the vibration proof device 100 and the second core 153 ata lower end portion of the vibration proof device 100 are inserted intothe vibration proof device fastening holes 330 formed in upper and lowerportions of the bracket device 300.

In the present case, the vibration proof device 100 is disposed in anopened internal compartment of the bracket device 300. The first stopper251 formed at one side of the support device 200 is disposed tocorrespond to the first stopper catching portion 351 formed at one sideof the bracket device 300. When the vibration proof device 100 moves inthe up and down direction by a predetermined distance, the upper orlower portion of the first stopper 251 comes into contact with the firststopper catching portion 351, and as a result, it is possible to preventthe vibration proof device 100 from moving a predetermined or longerdistance.

Meanwhile, the second stopper 252 formed at the other side of thesupport device 200 is disposed to correspond to the second stoppercatching portion 352 formed at the other side of the bracket device 300.When the vibration proof device 100 moves in the left and rightdirection by a predetermined distance, one side of the second stopper252 comes into contact with the second stopper catching portion 352, andas a result, it is possible to prevent the vibration proof device 100from moving a predetermined or longer distance.

FIG. 11 is a view diagrammatically illustrating a method ofmanufacturing the fluid mount according to an exemplary embodiment ofthe present invention. Referring to FIG. 11, first, the support device200 and the bracket device 300 are formed by an extrusion method (stepa).

Since the support device 200 and the bracket device 300 may be disposedon the single plane as described above, the support device 200 and thebracket device 300 may be manufactured through an extrusion process. Asan example, the extrusion method may be an aluminum extrusion method.When the support device 200 and the bracket device 300 are formed by thealuminum extrusion method, it is advantageous in view of qualityvariation because tissue is dense, and there is a great advantage interms of production costs because the process is simplified.

Thereafter, the first stopper 251 and the second stopper 252 are formed,by a curing process, on the support device 200 formed by the aluminumextrusion (step b). In the present case, the first stopper 251 and thesecond stopper 252 may be formed on the external circumferential surfaceof the vibration proof device fastening portion 210.

The vibration proof device 100 is manufactured by forming the insulators131 and 133 at both sides of the nozzle device 110 by a curing process,and the manufactured vibration proof device 100 is press-fitted into andassembled to the support device 200 (step c). In the present case, themanufactured vibration proof device 100 may be press-fitted into thesupport device 200 so that the external circumferential surface of thenozzle device 110 comes into contact with the internal circumferentialsurface of the vibration proof device fastening portion 210.

Finally, the vibration proof device 100, which is inserted into thesupport device 200, is assembled to the bracket device 300 (step d). Inthe present case, the vibration proof device 100 and the bracket device300 may be assembled by inserting the cores 151 and 153, which areprovided at the apex portions of the insulators 131 and 133, into thevibration proof device fastening holes 330, respectively.

According to the method of manufacturing the fluid mount according to anexemplary embodiment of the present invention, the support device 200and the bracket device 300 may be manufactured by the extrusion method,so that it is possible to improve rigidity of the support device 200 andthe bracket device 300, and to simply assemble the vibration proofdevice 100 to the bracket device 300, improving productivity.

FIG. 12 is a view illustrating a structure of the engine mount when thebracket device according to the exemplary embodiment of the presentinvention moves upward, and FIG. 13 is a view illustrating a structureof the engine mount when the bracket device according to the exemplaryembodiment of the present invention moves downward.

Referring to FIG. 12 and FIG. 13, the vibration proof device 100according to an exemplary embodiment of the present invention has theinsulators 131 and 133 at both sides based on the nozzle device 110, andas a result, when the nozzle device 110 is moved in one direction, oneinsulator is extended, and the other insulator is compressed, improvingdurability.

As an example, when the nozzle device 110 is moved upward as the supportdevice 200 moves upward, the first insulator 131, which is disposed atthe upper side of the nozzle device 110, may be compressed, and thesecond insulator 133, which is disposed at the lower side of the nozzledevice 110, may be extended, as illustrated in FIG. 12. In the case, thefluid in the first liquid chamber 141 flows to the second liquid chamber142 via the flow paths 112 and 113.

On the contrary, when the nozzle device 110 is moved downward as thesupport device 200 moves downward, the first insulator 131, which isdisposed at the upper side of the nozzle device 110, may be extended,and the second insulator 133, which is disposed at the lower side of thenozzle device 110, may be compressed, as illustrated in FIG. 13. In thepresent case, the fluid in the second liquid chamber 142 flows to thefirst liquid chamber 141 through the flow paths 112 and 113.

The vibration proof device 100 according to an exemplary embodiment ofthe present invention may have a greater damping ratio and higherdurability since the plurality of insulators are disposed in series atthe upper and lower sides of the nozzle device.

Meanwhile, in the case of a structure in the related art, noise, whichis caused by cavitation occurring in a flow path and rattling of themembrane, may be transmitted directly to the vehicle body through anexternal wall of the mount, but in the case of the vibration proofdevice 100 according to an exemplary embodiment of the presentinvention, since the insulators are disposed at the upper and lowersides of the nozzle device, and thus noise occurring in a flow path isinsulated by passing through the insulators, it is possible to minimizeabnormal noise being transmitted to the vehicle body.

For convenience in explanation and accurate definition in the appendedclaims, the terms “upper”, “lower”, “internal”, “outer”, “up”, “down”,“upwards”, “downwards”, “front”, “rear”, “back”, “inside”, “outside”,“inwardly”, “outwardly”, “internal”, “external”, “forwards” and“backwards” are used to describe features of the exemplary embodimentswith reference to the positions of such features as displayed in thefigures.

The foregoing descriptions of specific exemplary embodiments of thepresent invention have been presented for purposes of illustration anddescription. They are not intended to be exhaustive or to limit theinvention to the precise forms disclosed, and obviously manymodifications and variations are possible in light of the aboveteachings. The exemplary embodiments were chosen and described toexplain certain principles of the invention and their practicalapplication, to enable others skilled in the art to make and utilizevarious exemplary embodiments of the present invention, as well asvarious alternatives and modifications thereof. It is intended that thescope of the invention be defined by the Claims appended hereto andtheir equivalents.

What is claimed is:
 1. An engine mount comprising: a support devicewhich is fastened to an engine; a bracket device which is fastened to avehicle body; and a vibration proof device which connects the supportdevice and the bracket device, and attenuates vibration transmitted fromthe engine to the vehicle body, wherein the vibration proof deviceincludes: a nozzle device which is fastened to the support device, andhas a nozzle plate which divides an internal compartment of thevibration proof device into a first liquid chamber and a second liquidchamber, and a flow path which penetrates the nozzle plate; a firstinsulator which is provided at a first side of the nozzle device, anddefines the first liquid chamber together with the nozzle plate; a firstcore which protrudes from the first insulator toward a first side, andis fastened to the bracket device; a second insulator which is providedat a second side of the nozzle device, and defines the second liquidchamber together with the nozzle plate; and a second core whichprotrudes from the second insulator toward a second side, and isfastened to the bracket device, and wherein the first insulator and thesecond insulator are disposed to face each other at the first side andthe second side of the nozzle device.
 2. The engine mount of claim 1,wherein the first insulator is disposed at an upper side of the nozzledevice, the first core protrudes upward from the first insulator and isfastened to an upper portion of the bracket device, the second insulatoris disposed at a lower side of the nozzle device, and the second coreprotrudes downward from the second insulator and is fastened to a lowerportion of the bracket device.
 3. The engine mount of claim 2, whereinwhen the nozzle device is moved upward by a movement of the supportdevice, the first insulator is compressed, and the second insulator isextended, and when the nozzle device is moved downward by a movement ofthe support device, the first insulator is extended, and the secondinsulator is compressed.
 4. The engine mount of claim 3, wherein whenthe nozzle device is moved upward by a movement of the support device, afluid in the first liquid chamber flows to the second liquid chamber viathe flow path, and when the nozzle device is moved downward by amovement of the support device, a fluid in the second liquid chamberflows to the first liquid chamber via the flow path.
 5. The engine mountof claim 1, wherein the nozzle device is formed in a cylindrical shape,the flow path is formed in an annular shape, and the support deviceincludes a vibration proof device fastening portion coupled to anexternal circumference of the nozzle device.
 6. The engine mount ofclaim 5, wherein each of the first insulator and the second insulator isformed in a conical shape having an opening at a bottom side thereof,and the openings of the first and second insulators are disposed to bedirected toward the nozzle device, an apex portion of the firstinsulator is disposed to be directed toward a first side, and an apexportion of the second insulator is disposed to be directed toward asecond side.
 7. The engine mount of claim 2, wherein the bracket deviceincludes: an upper bracket to which the first core is fastened; a lowerbracket which is disposed to face the upper bracket and to which thesecond core is fastened; a first side bracket which extends from a firstend portion of the upper bracket to a first end portion of the lowerbracket; and a second side bracket which is disposed to face the firstside bracket, and extends from a second end portion of the upper bracketto a second end portion of the lower bracket, and wherein the vibrationproof device is disposed in a space defined by the upper bracket, thelower bracket, the first side bracket, and the second side bracket. 8.The engine mount of claim 7, wherein the support device includes avibration proof device fastening portion which is fastened to anexternal circumference of the nozzle device, and a first stopper whichprotrudes from an external circumferential surface of the vibrationproof device fastening portion in a radial direction thereof, and afirst stopper catching portion, which restricts upward and downwardmovements of the first stopper, is provided on the first side bracket.9. The engine mount of claim 8, wherein the first stopper catchingportion includes: an upward catching portion which is formed as thefirst side bracket, which extends downward from a first end portion ofthe upper bracket, is bent toward a first side; and a downward catchingportion which is formed as the first side bracket, which extends upwardfrom a first end portion of the lower bracket, is bent toward a firstside.
 10. The engine mount of claim 7, wherein the support deviceincludes a vibration proof device fastening portion which is fastened toan external circumference of the nozzle device, a plurality ofprotruding portions which protrudes from an external circumferentialsurface of the vibration proof device fastening portion in a radialdirection thereof, and a second stopper which is mounted between theprotruding portions, and a second stopper catching portion, whichrestricts forward and rearward movements of the second stopper, isprovided on the second side bracket.
 11. The engine mount of claim 10,wherein the second stopper catching portion includes: a forward catchingportion which is provided at a front side of the second side bracket,and restricts the rearward movement of the second stopper; and arearward catching portion which is provided at a rear side of the secondside bracket, and restricts the forward movement of the second stopper.12. The engine mount of claim 1, wherein the support device and thebracket device are manufactured by an aluminum extrusion process.
 13. Amethod of manufacturing an engine mount, which includes a support devicethat is fastened to an engine, a bracket device that is fastened to avehicle body, and a vibration proof device that connects the supportdevice and the bracket device, the method comprising: manufacturing thesupport device or the bracket device by an extrusion process; forming astopper on an external circumference of the support device by a curingprocess; inserting a vibration proof device into an internalcircumference of the support device; and fastening the vibration proofdevice, which is inserted into the support device, to the bracketdevice.
 14. The method of claim 13, wherein the manufacturing of thesupport device and the bracket device by the extrusion processmanufactures each of the support device and the bracket device by analuminum extrusion method.
 15. The method of claim 13, wherein thesupport device includes a vibration proof device fastening portion onwhich the vibration proof device is disposed, the forming of the stopperon the external circumference of the support device by the curingprocess includes attaching the stopper to an external circumferentialsurface of the vibration proof device fastening portion by the curingprocess, and the inserting of the vibration proof device into theinternal circumference of the support device includes inserting thevibration proof device into an internal circumferential surface of thevibration proof device fastening portion.